Electrophotographic developer

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

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Details

4301066, 430137, G03G 910, G03G 9113

Patent

active

055145094

ABSTRACT:
An electrophotographic developer includes a toner and a carrier, in which the carrier is provided on the surface of a core material thereof with a resin coating layer. The coating layer is made of cured body of a methyl silicone resin containing not less than 70% by weight of T-units and a methylated melamine resin having a molecular weight of not less than 700. This developer is not lowered in flowability, generates no spent particles and presents stable electric charging characteristics. Accordingly, the developer of the present invention is suitably used where a toner is used containing no electric charge controlling agent.

REFERENCES:
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patent: 4518727 (1985-05-01), Traver
patent: 4977054 (1990-12-01), Honjo et al.
patent: 5079124 (1992-01-01), Kawata et al.
Patent & Trademark English Translation of Japanese Patent 60-6953 (Pub. Jan. 14, 1985).
Database WPIL Derwent, AN 85-141038 relating to U.S. Pat. No. 4,518,727 to Traver, Apr. 21, 1985.
Patent Abstracts of Japan, vol. 9, No. 120 (P-358)(1843), May 24, 1985 to Nakayama JP 60-6953.
Patent Abstracts of Japan, vol. 11, No. 203 (P-591)(2650), Jul. 2, 1987 to Tosaka JP-62-24268.
Database WPIL Derwent AN 88-052965 relating to Japanese Patent Publication No. 63-008676, Jan. 14, 1988.
Patent Abstracts of Japan, vol. 8, No. 33 (P-254) to Takashi, Feb. 14, 1984 JP 58-189647.

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